Oil light comes on ,when oil is full. - 2005 Ford Ranger

try this link copy and paste

https://autovfix.com/why-will-oil-light-come-on-and-off-but-oil-is-full/

Oil light is rather important it goes out if oil pressure is good comes on if oil pressure is low when it comes on damage is expected with continued operation like wearing of main bearings and pistons and cylinders can lead to a engine rebuild

Could be the person who changed it never ran the motor and then topped it off once the filter was full. Have you checked the oil level after you let the car sit overnight to make sure the oil level is on full? I would say it could be a bad oil level sensor, except that the coincidence of coinciding with an oil change is too obvious.

The oil light has nothing to do will oil level, but rather oil PRESSURE. If the engine oil is full and there is no rattling or banging noises in the engine, chances are the oil pressure sending unit is bad. If noises accompany the light, then shut down the engine and troubleshooting the engines internal lubrication system.

If you have two different warning lights, it could be a wiring problem.
The low oil pressure warning could come on even if the engine is full of oil. If that is the only light coming on, it could be the sending unit or you could actually have low oil pressure.

if oil level is ok, your oil PRESSURE is dangerously low.
Either the wrong oil was used, or your oil pump is going bad.

Ill bet on wrong oil since you just had it changed,

That can be caused by low oil, low oil pressure, a filter starting to clog, wrong type of oil in engine, or the oil needing changed. You should first change the oil and filter then check your oil pressure and go from there.

change oil pressure switch it' should be near the oil filter

abs computer sounds no good,check for short in wire to oil sender wire might be grounding out to turn light on

The engine oil light measures oil pressure rather than volume. The senosr couldf be bad or your oil pump could be failing